Training after 40

The guidelines have no "plan for people over 40"

Here are the public recommendations first. For a 40-year-old they are the same as for a 30-year-old:

• WHO 2020 guidelines (adults 18–64): at least 150–300 minutes of moderate-intensity aerobic physical activity a week, or at least 75–150 minutes of vigorous-intensity aerobic activity; plus muscle-strengthening activities at moderate or greater intensity involving all major muscle groups on 2 or more days a week.
• China's physical activity guidelines for the Chinese population (2021), adults 18–64: 150–300 minutes of moderate-intensity or 75–150 minutes of vigorous-intensity aerobic activity a week, or an equivalent combination; muscle-strengthening on at least 2 days a week.
• From 65 onwards the WHO adds one item to the adult recommendation: varied multicomponent physical activity that emphasises functional balance and strength training at moderate or greater intensity on 3 or more days a week, to enhance functional capacity and prevent falls. China's guidelines put it as: the adult recommendation also applies to older adults, who should keep up balance, agility and flexibility work.

So the number 40 does not change what you should do. Two other things do change: you should start more carefully, and you should check whether anything health-related needs handling first.

Why strength work matters more at this age

The Cleveland Clinic's page on sarcopenia states that people gradually begin losing muscle mass and strength in their 30s or 40s, that the process picks up between the ages of 65 and 80, and that you may lose as much as 8% of your muscle mass each decade; resistance training can help reverse muscle loss and improve strength.

In other words, training for strength after 40 is less about how you look and more about the base you will be living on for the next few decades. The earlier you start the cheaper it is, and starting at any point still counts.

How to start

One of the good practice statements in the WHO guidelines is to start with small amounts of physical activity and gradually increase frequency, intensity and duration over time. The 2026 ACSM position stand on resistance training points the same way: train all major muscle groups at least two days a week and build gradually; the biggest jump in results is going from no resistance training to any; elastic bands, bodyweight exercises and home-based training are supported by evidence as effective options; and training to momentary failure, machines versus free weights, and complex periodization did not consistently change results for the average healthy adult.

On this site:

1. Pick a program from the program library by equipment and days per week, and take the two-day version first. Two days you can do beat three days you cannot.
2. If you have been away a long time or are starting from zero, read your first time in the gym and how to choose your first program.
3. Training at home is fine. Bodyweight and dumbbell programs sit alongside gym programs in the library.
4. Warm up properly; see how to warm up before training. If you are older, have been sitting all day, or train in the morning, make the general activity stage longer.
5. Start logging. You will need it in four weeks; see reading your progress.

If you have a chronic condition, take medication, or have not moved in years

The WHO guidelines state that physical activity is considered safe for adults living with the selected chronic conditions without contraindications and that the benefits generally outweigh the risks, while also noting that adults with chronic conditions may wish to consult a physical activity specialist or healthcare professional for advice on the types and amounts of activity appropriate for their individual needs.

So the order is: ask a doctor first, then pick a program — particularly with cardiovascular, metabolic, joint or post-surgical issues. China's 2021 guidelines include "be moderate and within your capacity" among their four guiding principles, and add for older adults that if their body does not allow 150 minutes of moderate-intensity activity a week, they should increase whatever activity they are able to do.

Joints and old injuries

If an exercise feels wrong in a joint or has a definite painful spot, swap it out instead of pushing through. Exercise pages on this site list substitutes, and you can also swap during a session. Persistent pain, swelling or a shrinking range of motion belongs with a doctor; it is not something you fix by adjusting the weight.

What counts is what you keep doing

The guiding principles of China's 2021 guidelines are: moving is beneficial, more is better, stay within your capacity, and consistency is what matters. The WHO puts it for older adults as being as physically active as functional ability allows and adjusting the level of effort relative to your level of fitness.

After 40 the expensive thing is not the weight on the bar; it is being able to finish several cycles in a row.

This is general training knowledge, not medical advice. Before starting or returning to training, consult a doctor or a qualified coach if you have a chronic condition, take long-term medication, or have a previous injury.